This might not be anything but i thought i would check with you guys to be sure. My Mini is a 1990 998cc HS4 carb. Filled it up the other day with fuel, went home, jacked up the right front wheel because i thought i heard a slight noise, just checking. Smelled fuel. Gas was dribbling out of the gas cap. It's a vented locking one. Tank to full? Or not sealing right. Normal?
Leaking Fuel
Started by
sparkymae
, Nov 11 2020 03:21 PM
Best Answer cal844 , 11 November 2020 - 03:54 PM
That's normal as the sealing ring is never perfect.
It is very annoying as you'll be dumping money on the floor
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5 replies to this topic
#1
Posted 11 November 2020 - 03:21 PM
#2
Posted 11 November 2020 - 03:54 PM Best Answer
That's normal as the sealing ring is never perfect.
It is very annoying as you'll be dumping money on the floor
It is very annoying as you'll be dumping money on the floor
#3
Posted 11 November 2020 - 08:17 PM
clean the petrol off - as it can damage the original paint
it can soften cellulose esp new paint
#4
Posted 11 November 2020 - 10:32 PM
clean the petrol off - as it can damage the original paint
it can soften cellulose esp new paint
Yup, I agree give it a gentle wash with car soap and water
#5
Posted 12 November 2020 - 11:34 PM
Thanks for your reply
#6
Posted 13 November 2020 - 06:42 PM
We had similar seal leaks on Ceandess type petrol caps commonly found on Lotus, Triumph cars and norton motorcycles. These are very much like the flip open Monza style found on some minis. To fix the problem on my Norton motorcycle, it needed more than just a fresh sealing rubber ring. It needed more force on the sealing surface. On the bike cap, there is a 1/2" bit of rubber hose sitting on top of the sealing plate, in addition to the actual spring. Renewing that old brittle rubber with new fuel proof hose made a huge improvement. No more full tank leaks.
Ive looked at my mini's flip cap and it doesn't have the rubber hose, just a rather weak spring to put pressure on the seal. I tried stretching the spring out a little to give bit more force. Didnt work. Might try a more robust spring one day.
Ive looked at my mini's flip cap and it doesn't have the rubber hose, just a rather weak spring to put pressure on the seal. I tried stretching the spring out a little to give bit more force. Didnt work. Might try a more robust spring one day.
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